氧化石墨烯-氨基酰化酶/聚偏氟乙烯复合膜的制备及特性  

Preparation and characteristic of graphene oxide-acylase/poly(vinylidene fluoride)composite membrane

作　　者：朱振亚[1,2] 白成玲 王磊 王旭东[1] 郭利妍[3] 李永进 ZHU Zhenya;BAI Chengling;WANG Lei;WANG Xudong;GUO Liyan;LI Yongjin(Research Institute of Membrane Separation Technology of Shaanxi Province,School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Province Key Laboratory of Sustained Utilization and Development of Water Resources,School of Water Resources and Environment,Hebei GEO University,Shijiazhuang 050031,China;Gocom Engineering Design Limited Company,Yantai 264670,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院陕西省膜分离技术研究院,西安710055 [2]河北地质大学水资源与环境学院河北省水资源可持续利用与开发重点实验室,石家庄050031 [3]金建工程设计有限公司,烟台264670

出　　处：《复合材料学报》2019年第11期2495-2501,共7页Acta Materiae Compositae Sinica

基　　金：陕西省重点科技创新团队计划(2017KCT-19-01);陕西省重点产业链(群)项目(2017ZDCXL-GY-07-02);西安市科技计划项目(201805033YD11CG17(3));陕西省技术创新引导专项(2018HJCG-18);陕西省自然科学基础研究计划课题(2017JM5110)。

摘　　要：通过静电吸附法成功制备了氧化石墨烯-氨基酰化酶(GO-acylase)颗粒。将GO和GO-acylase颗粒分别添加到聚偏氟乙烯(PVDF)铸膜液中,通过相转化法制备了GO/PVDF和GO-acylase/PVDF复合膜。结果显示,GO-acylase/PVDF复合膜的粗糙度最低(Ra=8.21nm),表面最平滑。GO/PVDF和GO-acylase/PVDF复合膜的接触角较小(73.72°和71.31°),说明复合膜的亲水性优于纯PVDF膜。由于GO的添加会增强溶质和非溶质之间的转化过程,从而导致GO/PVDF复合膜的纯水通量最大(69.0L/(m^2 h))。经过测定,GO-acylase/PVDF复合膜的生物活性在4℃下可以持续4周左右。研究结果表明,GO-acylase/PVDF复合膜的成功制备为抗生物污染膜的研发提供了新思路。A new type of graphene oxide-acylase(GO-acylase)nanoparticles was produced via an electrostatic force.The GO and GO-acylase were added to the poly(vinylidene fluoride)(PVDF)membrane casting solution respectively,and the GO/PVDF and GO-acylase/PVDF composite membranes were prepared through phase inversion by the immersion precipitation technique.The results show that the surface roughness of GO-acylase/PVDF membrane is very smooth(Ra=8.21nm),and the contact angles of GO/PVDF and GO-acylase/PVDF membranes are relatively lower(73.72°and 71.31°),which indicates that the hydrophilicity of composite membranes are better than that of pristine PVDF membrane.The addition of GO enhances the transformation process between solute and insoluble,which results in the highest pure water flux(69.0L/(m2h))of GO/PVDF membrane.The biological activity of GO-acylase/PVDF membrane can be maintained for about 4weeks,which indicates that the new GO-acylase/PVDF membrane is prepared successfully,and provides a new way to mitigate the bio-fouling of membrane.

关 键 词：聚偏氟乙烯 氧化石墨烯 氨基酰化酶 纳米颗粒 复合膜 

分 类 号：TB332[一般工业技术—材料科学与工程]